Large-Eddy Simulation of the Flow Around a Simplified Bus

Abstract

Two large eddy simulations of the flow past a bus-like vehicle body were made and the results are compared with experimental data. The effect of the near wall resolution and the modeling of the unresolved coherent structures in the near wall flow were studied. It was determined that, although the wall functions are inadequate to represent the thin vortices close to the wall, their use leads to results in a near wake region that are similar to those in the simulation with a sufficient wall normal resolution. This study indicates that the wall normal resolution has little influence on the pressure coefficient at the rear face.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013700

Entities

People

  • Lars Davidson
  • Sinisa Krajnovic

Organizations

  • Chalmers University of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Experimental Data
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Geometry
  • Large Eddy Simulation
  • Layers
  • Mechanical Properties
  • Navier Stokes Equations
  • Reynolds Number
  • Simulations
  • Stagnation Point
  • Three Dimensional
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Mechanics and Fluid Dynamics.